Exhaust bolt lock washers?

[SuburbanHunter]

What are the horseshoe shaped things that have tabs that you bend up to keep the exhaust bolts from coming loose called? I think they are stock. I found a picture of them but my local Auto-zone and o'riley don't have them (and couldn't even find them in their parts app).

so what are they called? I found the picture searching for "small block chevy exhaust bolt lock" but I am not sure that is proper name.
Do I have to get them from the dealer?

thanks,
d

[Irish_Alley]

theres exhaust locking tabs and locking bolts and then you have the ones with locking bolts wire. you can find them online or parts stores

[Jim_Hensley]

if you are running stock manifolds  you dont need to worry about them. Newer engines didnt even come with em.